Steam-blower



H. E. PARSON. STEAM BLOWER.

(No Model.)

Patented May 11, 1897.

n m H M ATTOIMIHS NITED STATES rrrcn.

PATENT STEAM-BLOWER.

SPECIFICATION forming part of Letters Patent No. 582,483, dated May 1 1,1897.

Application filed June 11, 1896.

T aZZ whom it may concern Be it known that I, HENRY E. PARSON, a citizenof the United States, residing at Brooklyn, in the county of Kings andState of New York, have invented certain new and useful Improvements inSteam-Blowers, of which the following is a specification.

This invention relates to an improved steam-blower for providing aforced draft to the furnace of steam-boilers, especially when burningbreeze, small coke, small sizes of anthracite coal, and coal or cokedust,whereby the formation of clinkers on the grate is prevented and amore economical combustion of fuel obtained; and the invention consistsof a steam-blower composed of an exterior casing, a nozzle-frameprovided with radial arms-and with a number of nipples on said arms,screw-threaded bosses in the rear wall of the nozzle-frame and alinedwith said nipples, and air-tubes inserted in said bosses and extendingat their tapering front ends into the conical bases of the nipples, soas to introduce a supply of heated airinto the steam ejected through thenipples, asuflicient quantity of atmospheric air being drawn in by thesteam-jets, so that a mixture of steam and heated air is supplied to thefuel on the grate.

In the accompanying drawings, Figure 1 represents a front elevation ofmy improved steam-blower. Fig. 2 is a vertical longitudinal section ofthe same on line 2 2, Fig. 1. Fig. 3 is a vertical longitudinal sectionthrough the casing of the steam-blower, showing the nozzle-frame in sideelevation; and Fig. 4 is a slight modification of the means forcontrollingthe steam-exit through the nipples.

Similar letters of reference indicate corresponding parts.

Referring to the drawings, A represents the casing of my improvedsteam-blower, which is located at the lower part of the front or sidewall of the furnace. The casingA passes through the wall of the furnaceand opens into the ash-pit of the same. In the casing A is arranged anozzle-frame B,which is provided with a number of radial arms I), thatare provided with a number of elongated steam-nipples b, that extend atright angles from the ends of the radial arms 1). The'upper end of thenozzle-frame is connected by Serial No. 596,130. (No model.)

a suitable steam-pipe with the dome of the steam-boiler, so as toconduct the steam into the interior of the nozzle-frame B, through thenipples into the casin g, and from the same into the ash-pit of thefurnace. The nipples are cast integral with the nozzle-frame and areeach made with an interior cylindrical bore and an outwardly-flaring orconical enlargement b at its base, as shown clearlyin Fig. 2. In linewith the axis of each nipple is formed on the rear wall of each arm ofthe nozzleframe a boss 0, which has a screw-threaded bore in which isarranged a solid valve-stem V, extending into the nipple, as shown inFig. 4, or there is screwed into said boss a threaded air-supply tube E,that is made tapering at its inner end and extends into the conical baseof the nipple Z), and which is provided at its outer end with a suitablenick for permitting its adjustment relatively to the nipple or theentire closing of the same against the exit of steam. By adj ustingtheair-supply tubes 6 relatively to the conical bases 1) of the nipples agreater or less quantity of steam is permitted to pass into the nipples,so that a greater or less suction is exerted on the air which passesthrough the air-supply tubes. The airis drawn into the jets of steambefore issuing from the nipples and heated up by contactwith the steam,so as to be sup plied in a highly-heated condition to the fuel on thegrate. The action of the steam and air jets ejected sets a body of airin motion,

that passes inwardly through the casing between the radial arms, saidbody of air supplying the required draft for the proper combustion ofthe fuel on the grate. As the air and steam intermingle with each otherin the ash-pit, (the doors of which are tightly closed,)

the steam and air is supplied under pressure through the openings in thegrate-bars to the fuel.

By regulating the relative position of the airsupply tubes to thenipples by which the steam is ejected a greater quantity of hot air canbe induced simultaneously with the steam into the fuel, While byregulating the supply of air by a suitable valve (not shown) any desiredpressure of the blast can be obtained, accordin g to the size of theboiler-furnace. Then the mixture of the steam and heated air is broughtinto contact with the body of incandescent fuel on the grate-bars, thesteam is dissoci ated and thereby a perfect combustion of the fuelobtained without any formation of clinkers on the grate-bars. Thecasingis made of suitable casting, likewise the nozzle-frame with itsnipples and bosses also being made in one casting by properly coercingthe nipples and perforated bosses, so that the nozzle-frame with itsadjustable supply-tubes forms with the casing a strong, durable, andcomparatively inexpensive steam-blower for furnaces burning small-sizedfuel or dust.

Having thus described my invention, I claim as new and desire to secureby Letters Patent- I11 a steam-blower for the furnaces of steamboilers,a nozzle-frame provided with radial arms having integralforward-projecting nipples, the bases of said nipples being conical andmerging directly into the front walls of the arms, and said arms havingon their rear walls integral bosses provided with internal screwthreads, and adjustable air tubes screwed into said bosses, saidsupply-tubes being provided with tapering inner ends which enter theconical bases of the nipples, substantially as set forth.

In testimony that I claim the foregoing as my invention I have signed myname in presence of two subscribing Witnesses.

' H. E. PARSON. Titnesses:

PAUL GoEPEL, GEO. W. JAEKEL.

